Citadel Mariner Synthetic 20 Gauge Pump-Action Shotgun, 18.5″ Barrel

Product Description

The Citadel Mariner Synthetic is a 20 gauge pump-action shotgun with an 18.5″ barrel. It holds 4+1 rounds in a tubular magazine and has a 3″ chamber, so it handles 3″ 20 gauge shells.

What sets it apart

The finish is nickel Cerakote, paired with a black synthetic stock. The sights are a blade design and they adjust. A heat shield sits over the barrel, and a side shell holder keeps spare shells on the gun. The firing system uses an internal hammer. A Picatinny rail is built in, so you can mount an optic without a separate adapter.

The length of pull is 13.6″. The 18.5″ barrel keeps the overall gun short, which helps in tight spaces such as a truck cab, a blind, or a hallway.

This shotgun fits shooters who want a pump-action 20 gauge for home defense, hunting, or general field use. The Picatinny rail also makes it a fit for anyone who prefers a red dot over iron sights.

For gear, start with a red dot or other optic that mounts to Picatinny. Add a sling, a padded case, and a box of 3″ 20 gauge shells for patterning. Pattern the gun with your chosen load before you rely on it.

Citadel Mariner Synthetic 20 Gauge Pump-Action Shotgun, 18.5" Barrel Specifications

Fits and Pairs With

• HEVI-Shot HEVI-Hitter 20 Gauge 3" 2 gr Tungsten Ammo, 25 Rounds
• Winchester Ammunition Defender 20 Gauge 2.75" 3 gr Ammo, 10 Rounds
• Remington Gun Club, Target Loads, 20 Gauge, 2.75", 25 Round Box, 20GA 7/8OZ #7.5
• Winchester Ammunition Super-X, 20 Gauge, 25 Round Box

Ordering from Western Sport

Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Frequently Asked Questions

Q: How many rounds does the Citadel Mariner Synthetic hold?

A: 4+1 rounds. The ammunition is held in a tubular magazine under the barrel.

Q: Can I mount an optic on the Citadel Mariner Synthetic?

A: Yes. It has a built-in Picatinny rail for mounting an optic. It also comes with adjustable blade sights.

Q: What shell length does this 20 gauge shotgun chamber?

A: 3 inches. The chamber is 3", and the gun is a 20 gauge pump action.

Q: What is the barrel length and length of pull?

A: The barrel is 18.5" and the length of pull is 13.6".

Warranty and Manufacturer

Covered by the Citadel factory warranty; warranty terms come from Citadel.

Additional information